steps

Print front and back rib cage templates. Trim first page on solid line and match to dotted line on second page; tape together.

Pinch front of white T-shirt at center of neck and pull forward, lining up sleeve and side seams, to create a fold down center front of shirt. Lay T-shirt flat on a cutting mat with this fold to the right.

Spray repositionable adhesive on back of front rib cage template. Place on folded front side of T-shirt, lining up vertical line with fold.